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Precision Edge®

SY58022U

Micrel, Inc.

DESCRIPTION

■ Precision 1:4, 400mV LVPECL fanout buffer

■ Guaranteed AC performance over temperature and

voltage:

• > 5.5GHz f

• < 80ps t

• < 250ps (V

• < 15ps max. skew

■ Low jitter performance:

• < 10ps

• < 1ps

• < 10ps

■ Accepts an input signal as low as 100mV

■ Unique input termination and V

DC- and AC-coupled differential inputs: LVPECL,

LVDS and CML

■ 400mV LVPECL compatible outputs

■ Power supply 2.5V ±5% and 3.3V ±10%

■ –40°C to +85°C temperature range

■ Available in 16-pin (3mm × 3mm) MLF™ package

FEATURES

SY58022U

APPLICATIONS

■ All SONET and All GigE clock distribution

■ Fibre Channel clock and data distribution

■ Backplane distribution

■ Data distribution: OC-48, OC-48+FEC, XAUI

■ High-end, low-skew, multiprocessor synchronous

clock distribution

Rev.: B

Amendment: /0

Issue Date:

May 2005

The SY58022U is a 2.5V/3.3V precision, high-speed, fully

differential 1:4 LVPECL fanout buffer. Optimized to provide

four identical output copies with less than 15ps of skew and

less than 10ps

signals as fast as 5.5GHz.

The differential input includes Micrel’s unique, 3-pin input

termination architecture interfaces to differential LVPECL,

CML, and LVDS signals (AC- or DC-coupled) as small as

100mV without any level-shifting or termination resistor

networks in the signal path. For AC-coupled input interface

applications, an on-board output reference voltage (V

provided to bias the V

compatible, with extremely fast rise/fall times guaranteed to

be less than 80ps.

The SY58022U operates from a 2.5V ±5% supply or

3.3V ±10% supply and is guaranteed over the full industrial

temperature range (–40°C to +85°C). For applications that

require greater output swing or CML compatible outputs,

consider the SY58021U 1:4 fanout buffer with LVPECL

outputs, or the SY58020U 1:4 fanout buffer with 400mV

CML outputs. The SY58022U is part of Micrel’s high-speed,

documentation can be found on Micrel’s web site at: www.

micrel.com.

FUNCTIONAL BLOCK DIAGRAM

Precison Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.

TYPICAL PERFORMANCE

Precision Edge

®

5.5GHz 1:4 FANOUT BUFFER/

TRANSLATOR w/400mV LVPECL

OUTPUTS AND INTERNAL INPUT TERMINATION